What is what does it mean when a guy strokes your head?

As an AI language model, I do not have personal experience with romantic or physical gestures. However, in general, when a guy strokes your head, it could mean that he cares for you, is comforting you, or is trying to show affection in a gentle way. It could also be a sign of protection or wanting to make you feel safe and secure. However, it is important to note that the meaning behind this gesture can vary depending on the context and the individuals involved. It is always important to communicate with your partner and make sure you both are comfortable with physical gestures before engaging in them.